/
main.go
48 lines (38 loc) · 805 Bytes
/
main.go
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package main
import (
"fmt"
"unsafe"
)
func main() {
//array1()
//array2()
//array3()
array4()
}
func array1() {
arr := [3]string{1: "Chris", 2: "Ron"}
arr2 := [...]int{3: -1}
fmt.Println(arr, arr2)
}
func array2() {
var intValue = [4]int{1, 2, 3, 4}
fmt.Println(intValue)
unsafePtr := unsafe.Pointer((&intValue[0]))
uintPtr := uintptr(unsafePtr) + 2*unsafe.Sizeof(intValue[0]) // right
//uintPtr := uintptr(unsafePtr) + 2 // wrong
*(*int)(unsafe.Pointer(uintPtr)) = 6
//*(*int)(unsafePtr + 2) = 6 // wrong
//(*int)(unsafePtr + 2*unsafe.Sizeof(intValue[0])) = 6 // wrong
fmt.Println(intValue)
}
func array3() {
arr := [3]int{2, 3}
arr2 := [...]int{3: -1}
fmt.Println(arr, arr2)
}
func array4() {
arr := [3]int{1, 2, 3}
arr2 := arr
arr2[0] = 0
fmt.Println(arr, arr2)
}